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jszapipes
Beginner

Call issues with SIP Trunk

We're having issues getting SIP inbound/outbound calls working. Outbound calls receive an immediate fast busy signal. I have posted my config along with debug ccsip messages. Assistance with a resolution would be much appreciated.

 

 

2 REPLIES 2
Mohammed al Baqari
VIP Advisor

Hi,

Your configs aren't consistent with your debugs. The debugs are matching outgoing dialpeer as 1006 while your config has no dialpeer 1006

Hi,

We dont see the outbound dial-peer as Mohammed mentioned. But here are a couple of things you can do..

1. Apply the correct sip bind statements to your dial-peers eg

 

++ CUCM facing dial-peer ++

dial-peer voice 2000 v

voice-class sip bind control source-interface interface Loopback0 

voice-class sip bind media source-interface interface Loopback0

 

++ ITSP dial-peer ++

dial-peer voice yyyy voip

voice-class sip bind control source-interface interface GigabitEthernet0/0/1 [assuming gig0/0/1 = interface that connects to ITSP]

voice-class sip bind media source-interface interface GigabitEthernet0/0/1 [assuming gig0/0/1  = interface that connects to ITSP]

 

Second thing is turn off TCP as the transport protocol on the dial-peer facing your ITSP. Try with default UDP first because some ITSP wont allow TCP unless of course you have been told to use TCP

 

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